Speedball #3571 red block printing ink. Experience the beauty of block printing on fabric. This permanent, oil-based ink provides bold opaque color, yet cleans up easily with soap and water. Excellent for use on cotton, polyester blends, linen, rayon, other synthetic fibers (not nylon), as well as paper and cardboard. AP non-toxic, conforms to ASTM D-4236. 2.5 oz. (75ml) tube of RED ink is made in the USA.